php byte数组加密

<?php
// 加密函数
function encrypt($data, $key) {
    $iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length('aes-256-cbc'));
    $encrypted = openssl_encrypt($data, 'aes-256-cbc', $key, 0, $iv);
    return base64_encode($iv . $encrypted);
}

// 解密函数
function decrypt($data, $key) {
    $data = base64_decode($data);
    $iv = substr($data, 0, 16);
    $encrypted = substr($data, 16);
    return openssl_decrypt($encrypted, 'aes-256-cbc', $key, 0, $iv);
}

// 示例数据
$data = "Hello, World!";
$key = "ThisIsASecretKey"; // 密钥应保持私密且长度符合算法要求

// 加密
$encryptedData = encrypt($data, $key);
echo "Encrypted Data: " . $encryptedData . "\n";

// 解密
$decryptedData = decrypt($encryptedData, $key);
echo "Decrypted Data: " . $decryptedData . "\n";
?>